Improve RuboCop rules (compatibility to Code Climate) (#3636)

08f8de84eb/Gemfile.lock (L38)
Code Climate is using RuboCop v0.46.0.

Change several rules to maintain compatibility.

.rubocop.yml

@@ -17,12 +17,19 @@ Bundler/OrderedGems:
 Layout/AccessModifierIndentation:
   EnforcedStyle: indent
 
+Layout/EmptyLineAfterMagicComment:
+  Enabled: false
+
 Layout/SpaceInsideHashLiteralBraces:
   EnforcedStyle: space
 
 Metrics/AbcSize:
   Max: 100
 
+Metrics/BlockLength:
+  Exclude:
+    - 'lib/tasks/**/*'
+
 Metrics/BlockNesting:
   Max: 3
 
@@ -58,6 +65,9 @@ Rails:
 Rails/HasAndBelongsToMany:
   Enabled: false
 
+Rails/SkipsModelValidations:
+  Enabled: false
+
 Style/ClassAndModuleChildren:
   Enabled: false
 
@@ -81,11 +91,19 @@ Style/GuardClause:
 Style/Lambda:
   Enabled: false
 
+Style/PercentLiteralDelimiters:
+  PreferredDelimiters:
+    '%i': '()'
+    '%w': '()'
+
 Style/PerlBackrefs:
   AutoCorrect: false
 
 Style/RegexpLiteral:
   Enabled: false
 
+Style/SymbolArray:
+  Enabled: false
+
 Style/TrailingCommaInLiteral:
   EnforcedStyleForMultiline: 'comma'